This chapter investigates the 2019 amendment of the Japanese leniency programme. The authors’ approach starts by observing that the old leniency programme may have substantially contributed neither to detecting nor to deterring cartels. The question, therefore, is whether the new leniency programme, whereby the amount of reduction of the leniency programme is drastically lowered for subsequent applicants but which can be compensated by entering a consultation process with the JFTC regarding the information to be submitted, is able to address the limitations of the old leniency programme. The chapter concludes that this may not be the case, since the changes to the leniency programme only address the potential of subsequent leniency applications. Nothing is done to attract better leniency applications from the start. To increase deterrence, the authors therefore investigate whether there is still some possibility of tweaking the sanctions in order to compensate for what the leniency programme cannot yet achieve.